Abrading boll



W. J. MADDOX ABRADING ROLL Aug. 2, 1938.

Original Filed Aug. 19, 1926 gwnntoc 114mm J/fladdwr UNITED STATES PATENT OFFlCE v ABBADING ROLL William J. Maddox, Jamestown, N. 1., assignor to Even-Cut Abrasive Band & Equipment Corpciriatlon, Cleveland, Ohio, a corporation of o Original No. 1,883,741, dated October 18, 1932, Se-

rial No. 130,245, August 19, 1926. Application for reissue December 4, 1933, Serial No. 700,910

4 Claims. (Cl. 551-194) This invention relates to improvements in hollow cylinder formed of heavy paper or pasteabrading rolls and particularly to abrading rolls board to which the abrasive material may be ap- Ior use in wood dressing apparatus commonly plied by dusting it thereon, so to speak, or it may known as spindle sanders. be applied in sheet-like form. In Figs. 1 and 2 One object of the invention is to provide an the abrasive material is in sheet form, the sheet I abrading roll which is comparatively inexpensive ll being attached permanently and fixedly to the to produce and whose abrading surface only need paper body III with an adhesive such as glue or be discarded when the roll is worn out. In the the like. In Figs. 3 and 4 the paper body I8 is present roll, the abradlng surface is seli-supportcoated with an adhesive and the abrasive mateing but possesses some degree of resiliency so that rial dusted thereon. when the abrasive material it may yield somewhat when the article being is applied in a sheet, as in Figs. 1 and 2, the sheet worked upon is pressed against it during the sandis wound spirally of the roll so that the seams ing operation. This yielding characteristic of the formed by successive convolutions will not proroll is the same as a cushioning eflect, a property duce any markings on the article being sanded.

which is heretofore being secured by the provision In each form 01 roll the hollow tubular body 1 of a cushion of felt, rubber or other material interportion I0 is provided with means for mounting posed between the abrading surface and the base it in the sanding machine for rotation when in member of the roll. operation. Such means may consist of end pieces,

0 A iurther object is to provide a roll of comparapreferably in the form of caps which substantively light weight and one that is evenly balanced tially close the ends of the tube. The preferred m whereby the roll may be operated at a comparaform is shown in the present instance wherein the tiveiy high rate 01' speed. cap comprises a head I! and a shank ii of re- Another object'contemplated is the provision of duced cross section which projects a short disa roll wherein the abrading material is firmly tance into the interior of the body l0. The shank attached or secured to the surface of the roll, inl3 makes a close friction lit in said body so as to 25 stead of having such material carried by a sheet retain therein and the shoulder formed by the attached to a drum, so that no means are neceshead l2 has a circular groove ll therein in which sary in the present case for stretching or taking the end of the body It seats. The cap at one end up any looseness in the sheet carrying the abraof the roll is formed with a central tapered bore I5 sive material. More specifically the roll contemin whicha correspondingly tapered spindle I6 01 plated by the present invention comprising a holthe sander is inserted, the roll being held tight low member or body portion, preferably formed 0! on said spindle by a centering point i1 which is paper board or other composition of vegetable received in a suitable recess i! in the other end fiber, to which the abrasive material is firmly atcap of the roll. Said centering point can be an tached by some adhesive such as'glue. At its ends ordinary set screw threaded in a bracket 01' the 35 said body portion is provided with means for sander so as to force the roll on the tapered spinmounting it in the sanding machine. These die It. To transmit rotary motio from the D means may take various forms, being shown in die to the roll, said spindle may have a cross pin the present instance as .end cap pieces which may which M5111 8 $101? 20 extending transversely of 40 be made up from wood, metal or the like. The e e a b e i of the l p cap pieces illustrated comprise a shank which It will be understood that the hollow body enters the hollow body portion and a head iormportion ill may be made up from any suitable ing a shoulder having a groove therein in which material but paper is preferred as it is inexpenthe end oi. the body portion seats. sive, light and. ordinary glue adheres firmly In the accompanying drawing: thereto. Due to the light weight of paper and 45 Figure 1 is an elevational view of a roll embodythe even distribution of the wei ht e t ing the present improvements; roll is evenly balanced and may be operated at Fig. 2 is a sectional view longitudinally of the an exceedingly high rate of speed. With solid roll illustrated in Fig. 1; wooden rolls, the weight may or may not Fig. 8 is an elevation of a modified form of roll; be evenly distributed and the same and of rotation cannot be attained. On account of Fig. 4 is a transverse sectionalview of the roll the low cost of the hollow body, users of the roll showninFlg. 3. can discard the body portions ll after they are purposes economy the body portion ll worn out by withdrawing the frictionally reoithe roll is preferably made up in the form of a 'tained end cap pieces and the latter can be used I5 with new bodies. The shanks "oi the cap pieces extendonlyashort distanceinto thebody portion and while the latter is self-sustaining nevertheless it a certain degree oi give or resiliency whichris quite a desirable characterlstlc. 'lhe desirability thereof is patent from instances prior art'rolls spirally the fact that in some having solid bodies have been provided with a cushion interposed between said solid body and the abrasive material to secure this resiliency. What I claim is: V I 1. An abrading roll comprising apair of-end pieces adapted for reception upon the roll mounts of a rotary sbrading machine, and an abrasive coated unitary tubular member composition supported only adjacent its ends by said end pieces.

' 2. An abrading roll comprising a pair of end pieces adapted for reception upon the roll amounts of a rotary abrading machine'and a ofstifl paper replaceable abrading element consisting ot a single tube or still but inherently resilient material coated withfabrasive and supported only adjacent its ends by said end pieces.

3. In a method of making a tubular abrasive element. the steps which consist in wrapping upon a hollow mandrel an abrasive coated strip with the edges of adjacent convoiu-r, tions in contact with each other, and securing said strip to said mandrel by inter-posing alayer of adhesive.

4. An abrasive element comprising a hollow cylindrical mandrel and a spirally wrapped abrasive coated sheet adhesively secured to said mandrel and completely covering the outer surface thereoi', the convolutions 01' said sheet having adJacen edges in contact without overflowing. I

WILLIAM J. mmnox. 

